Black Forest Ultra 100k
Typically 50–66°F · some rain risk
See last 10 years
On this date: rain 2 of the last 10 years
2025
46–72°F
dry
2024
46–68°F
dry
2023
53–78°F
dry
2022
38–54°F
dry
2021
53–68°F
rain
2020
38–55°F
dry
2019
51–60°F
rain
2018
55–68°F
dry
2017
49–69°F
dry
2016
50–65°F
dry
Best months to race in Pennsylvania →
About this race
One of the toughest 100k trail ultras in the Northeast. Midnight start. No crews. No pacers. No spectators. Diabolically epic!
Experience the brutal yet stunning beauty of the Black Forest Trail deep in the mountains of the Pennsylvania Wilds. Climb to astounding views of the surrounding peaks and valleys and run through an assortment of forest types ranging from pine plantations, giant hemlocks and red spruce - all in the peak of fall colors. But beware, some of these beautiful vistas require climbing elevation gains of over 1,000 ft in under a mile! The course is a lollipop with over 13,400 ft of elevation gain; this is a tough and taxing course without a doubt and to add a twist to the equation, the course reverses each year so that the majority of elevation gain alternates from the back half of the course to the front half. If that monkey wrench wasn't sufficient already, the race starts at midnight in the inky blackness and you will have a strict 19 hours to complete the course!
Not hard enough you say? Here's a few more layers of crazy. No crews. No pacers. No spectators. Some are calling this the evil and twisted step brother of the Worlds End 100k. No matter how you classify this beast, be prepared to exorcise your demons!
Course map
Train with a club
Run clubs near North Bend to train with before race day.
Tyoga Running Club, Inc.
Wellsboro, PASuggested Races
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